Geometry Question Find the area of the circle

Area of the circle = 706.5 cm²

Step-by-step explanation:

Diameter = 30cm

Radius = 15cm

Area of the circle=πr²= 3.14(15)²= 3.14×225 = 706.5 cm²

the area of the circle

= 706.5 cm²

Step-by-step explanation:

r = 1/2d

r = 1/2 × 30

r = 15 cm

= 3.14 × 15 × 15

= 706.5 cm²

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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